This image above for the eagle used on J80/P87 was produced via a reducing lathe on a brass disk. It was not struck from a die. It is illustrated as figure 81 on page 40 of the "History of the National Numismatic Collections" by Vladimir Clain-Stefanelli where it is described as a "Mechanical Reduction from cast bronze model to actual size used on pattern half dollar, 1838". The cast bronze model used to produce it is also displayed as figure 80. Image courtesy of the National Numismatic Collection of the Smithsonian Institution.